Since Apple and Intel’s joint announcement of the Thunderbolt high-speed I/O technology, one of the most anticipated products to make use of the technology has been the Thunderbolt-compatible Little Big Disk from LaCie. The drive – which comes in both HDD and SSD flavors – was announced all the way back in February for a “summer” launch, and is now finally arriving at Apple Stores in both the United States and internationally. LaCie’s description of Thunderbolt and why it is important for a product like the Little Big Disk:

This new high-speed cable technology connects computers and electronic devices together like never before. Thunderbolt technology supports two 10Gb/s bi-directional channels from a single port, the fastest data connection available on a personal computer. At 10Gb/s, a full-length HD movie can be transferred in less than 30 seconds.

Since the drive carries two ports, it can be daisy chained. The drives have already arrived at Apple Stores, which suggest immediate availability, and we are expecting an official announcement from LaCie in the coming days. The hard disk drive variant with 1TB of storage will reportedly cost $399.